What is solenoid? Give the characteristics of magnet from solenoid.

A solenoid is a device which is formed when an insulated current carrying wire is bent into a coil with an N number of loops or turns. It is like wrapping of a wire on a cylindrical object.

•The individual magnetic field of each turn contribute and it results into a magnetic field which is like the magnetic field of a bar magnet.

•The magnetic field of the solenoid depend on the number of turns present. It is directly proportional to the number of turns, ore number of turns more strong magnetism. For example if we have to lift a very have metal pipe we would use a solenoid with very large number of turns, as they will have a stronger magnetic field. In simple terms the magnetism of a solenoid is controllable.

•Furthermore the magnetism of a solenoid can be increased by putting an iron rod through the coils.

•The direction of that magnetic field inside the solenoid is determined by Right hand thumb rule which is directed from south to north but outside the solenoid it is from North to South.